ISL6232 Просмотр технического описания (PDF) - Intersil

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ISL6232

High Efficiency System Power Supply Controller for Notebook Computers

Intersil 

ISL6232

Typical Operating Performance Circuit in Figure 29, no load on LDO5, LDO3, OUT3 OUT5, and REF, VIN = 12V,

EN3 = EN5 = VCC, SHDN# = VIN, TA = 25°C, unless otherwise noted. (Continued)

3.5

5.2

3.4

3.3

EN3=0

5.15

5.1

5.05

EN5=VCC

3.2

5

3.1

EN3=VCC

3

4.95

EN5=0

4.9

4.85

2.9

0

10 20 30 40 50 60 70 80 90 100

LDO3 OUTPUT CURRENT (mA)

4.8

0

10 20 30 40 50 60 70 80 90 100

LDO3 OUTPUT CURRENT (mA)

FIGURE 19. LDO3 REGULATION OUTPUT VOLTAGE vs

OUTPUT CURRENT

FIGURE 20. LDO5 REGULATION OUTPUT VOLTAGE vs

OUTPUT CURRENT

2

1.99

1.98

1.97

1.96

1.95

-10 0

10 20 30 40 50 60 70 80 90 100

IREF (µA)

FIGURE 21. REFERENCE VOLTAGE vs OUTPUT CURRENT

VIN

(5V/div)

LDO3

(1V/div)

LDO5

(2V/div)

REF

(1V/div)

FIGURE 22. REF, LDO3, AND LDO5 POWER UP

EN

(2V/div)

VOUT3

(2V/div)

VOUT5

(2V/div)

FIGURE 23. DELAYED START WAVEFORMS (EN5=REF)

9

EN5

(2V/div)

VOUT3

(2V/div)

VOUT5

(2V/div)

FIGURE 24. DELAYED START WAVEFORMS (EN3=REF)

FN9116.0

April 18, 2005

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